Improve the lint situation (#1688)

* Move common flake8 options into config file

Currently --max-line-length being specified in two places. Just use the
existing value in the config file as the source of truth.

Move --count and --statistics to config file as well.

* Fix some lints

.github/workflows/lint.yml

@@ -30,6 +30,6 @@ jobs:
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names
-        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        flake8 . --select=E9,F63,F7,F82 --show-source
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=5 --max-line-length=120 --statistics
+        flake8 . --exit-zero --max-complexity=5

rq/cli/cli.py

@@ -24,7 +24,6 @@ from rq.defaults import (DEFAULT_CONNECTION_CLASS, DEFAULT_JOB_CLASS,
 from rq.exceptions import InvalidJobOperationError
 from rq.registry import FailedJobRegistry, clean_registries
 from rq.utils import import_attribute, get_call_string, make_colorizer
-from rq.serializers import DefaultSerializer
 from rq.suspension import (suspend as connection_suspend,
                            resume as connection_resume, is_suspended)
 from rq.worker_registration import clean_worker_registry

rq/cli/helpers.py

@@ -11,7 +11,6 @@ from ast import literal_eval
 from shutil import get_terminal_size
 
 import click
-import redis
 from redis import Redis
 from redis.sentinel import Sentinel
 from rq.defaults import (DEFAULT_CONNECTION_CLASS, DEFAULT_JOB_CLASS,

rq/compat/__init__.py

@@ -3,8 +3,7 @@ import sys
 
 def is_python_version(*versions):
     for version in versions:
-        if (sys.version_info[0] == version[0] and
-                sys.version_info >= version):
+        if (sys.version_info[0] == version[0] and sys.version_info >= version):
             return True
     return False
 

rq/compat/connections.py

@@ -1,8 +1,3 @@
-from functools import partial
-
-from redis import Redis
-
-
 def fix_return_type(func):
     # deliberately no functools.wraps() call here, since the function being
     # wrapped is a partial, which has no module

rq/utils.py

@@ -16,11 +16,12 @@ from collections.abc import Iterable
 
 from redis.exceptions import ResponseError
 
-from .compat import as_text, is_python_version, string_types
+from .compat import as_text, string_types
 from .exceptions import TimeoutFormatError
 
 logger = logging.getLogger(__name__)
 
+
 class _Colorizer:
     def __init__(self):
         esc = "\x1b["

rq/worker.py

@@ -36,8 +36,7 @@ from .queue import Queue
 from .registry import FailedJobRegistry, StartedJobRegistry, clean_registries
 from .scheduler import RQScheduler
 from .suspension import is_suspended
-from .timeouts import (JobTimeoutException, HorseMonitorTimeoutException,
-                       UnixSignalDeathPenalty, TimerDeathPenalty)
+from .timeouts import JobTimeoutException, HorseMonitorTimeoutException, UnixSignalDeathPenalty
 from .utils import (backend_class, ensure_list, get_version,
                     make_colorizer, utcformat, utcnow, utcparse)
 from .version import VERSION

setup.cfg

@@ -8,3 +8,5 @@ universal = 1
 [flake8]
 max-line-length=120
 ignore=E731
+count=True
+statistics=True

tests/fixtures.py

@@ -222,9 +222,11 @@ def kill_worker(pid, double_kill, interval=0.5):
 
 
 class Serializer:
-    def loads(self): pass
+    def loads(self):
+        pass
 
-    def dumps(self): pass
+    def dumps(self):
+        pass
 
 
 def start_worker(queue_name, conn_kwargs, worker_name, burst):
@@ -238,6 +240,7 @@ def start_worker(queue_name, conn_kwargs, worker_name, burst):
             w = Worker([queue_name], name=worker_name, connection=Redis(**conn_kwargs))
             w.work(burst=burst)
 
+
 def start_worker_process(queue_name, connection=None, worker_name=None, burst=False):
     """
     Use multiprocessing to start a new worker in a separate process.
@@ -248,6 +251,7 @@ def start_worker_process(queue_name, connection=None, worker_name=None, burst=Fa
     p.start()
     return p
 
+
 def burst_two_workers(queue, timeout=2, tries=5, pause=0.1):
     """
     Get two workers working simultaneously in burst mode, on a given queue.

tests/test_cli.py

@@ -406,7 +406,7 @@ class TestRQCli(RQTestCase):
         runner = CliRunner()
         job = q.enqueue(say_hello)
         runner.invoke(main, ['worker', '-u', self.redis_url,
-                            '--serializer rq.serializer.JSONSerializer'])
+                             '--serializer rq.serializer.JSONSerializer'])
         self.assertIn(job.id, q.job_ids)
 
     def test_cli_enqueue(self):
@@ -439,7 +439,7 @@ class TestRQCli(RQTestCase):
         self.assertTrue(queue.is_empty())
 
         runner = CliRunner()
-        result = runner.invoke(main, ['enqueue', '-u', self.redis_url, '-S', 'rq.serializers.JSONSerializer',  'tests.fixtures.say_hello'])
+        result = runner.invoke(main, ['enqueue', '-u', self.redis_url, '-S', 'rq.serializers.JSONSerializer', 'tests.fixtures.say_hello'])
         self.assert_normal_execution(result)
 
         prefix = 'Enqueued tests.fixtures.say_hello() with job-id \''

tests/test_decorator.py

@@ -106,7 +106,7 @@ class TestDecorator(RQTestCase):
 
         bar_job = bar.delay()
 
-        self.assertEqual(foo_job._dependency_ids,[])
+        self.assertEqual(foo_job._dependency_ids, [])
         self.assertIsNone(foo_job._dependency_id)
 
         self.assertEqual(foo_job.dependency, None)
@@ -143,8 +143,8 @@ class TestDecorator(RQTestCase):
         self.assertIsNone(foo_job._dependency_id)
         self.assertIsNone(bar_job._dependency_id)
 
-        self.assertEqual(foo_job._dependency_ids,[])
-        self.assertEqual(bar_job._dependency_ids,[])
+        self.assertEqual(foo_job._dependency_ids, [])
+        self.assertEqual(bar_job._dependency_ids, [])
         self.assertEqual(baz_job._dependency_id, bar_job.id)
         self.assertEqual(baz_job.dependency, bar_job)
         self.assertEqual(baz_job.dependency.id, bar_job.id)
@@ -167,7 +167,6 @@ class TestDecorator(RQTestCase):
         result_job = Job.fetch(id=result.id, connection=self.testconn)
         self.assertEqual(result_job.failure_callback, print)
 
-
     def test_decorator_accepts_on_success_function_as_argument(self):
         """Ensure that passing in on_failure function to the decorator sets the
         correct on_success function on the job.

tests/test_queue.py

@@ -1,6 +1,6 @@
 import json
 from datetime import datetime, timedelta, timezone
-from rq.serializers import DefaultSerializer, JSONSerializer
+from rq.serializers import JSONSerializer
 from unittest.mock import patch
 
 from rq import Retry, Queue

tests/test_scheduler.py

@@ -4,7 +4,6 @@ from multiprocessing import Process
 
 from unittest import mock
 from rq import Queue
-from rq.compat import PY2
 from rq.exceptions import NoSuchJobError
 from rq.job import Job, Retry
 from rq.registry import FinishedJobRegistry, ScheduledJobRegistry
@@ -96,7 +95,7 @@ class TestScheduledJobRegistry(RQTestCase):
         with mock_tz, mock_day, mock_atz:
             registry.schedule(job, datetime(2019, 1, 1))
             self.assertEqual(self.testconn.zscore(registry.key, job.id),
-                                1546300800 + 18000)  # 2019-01-01 UTC in Unix timestamp
+                             1546300800 + 18000)  # 2019-01-01 UTC in Unix timestamp
 
             # second, time.daylight != 0 (in DST)
             # mock the sitatuoin for American/New_York not in DST (UTC - 4)
@@ -326,6 +325,7 @@ class TestWorker(RQTestCase):
         registry = FinishedJobRegistry(queue=queue)
         self.assertEqual(len(registry), 1)
 
+
 class TestQueue(RQTestCase):
 
     def test_enqueue_at(self):

tests/test_utils.py

@@ -1,6 +1,5 @@
 import re
 import datetime
-from unittest import mock
 
 from redis import Redis
 

tests/test_worker.py

@@ -8,7 +8,7 @@ import sys
 import time
 import zlib
 
-from datetime import datetime, timedelta, timezone
+from datetime import datetime, timedelta
 from multiprocessing import Process
 from time import sleep
 
@@ -29,7 +29,7 @@ from tests.fixtures import (
 
 from rq import Queue, SimpleWorker, Worker, get_current_connection
 from rq.compat import as_text, PY2
-from rq.job import Job, JobStatus, Dependency, Retry
+from rq.job import Job, JobStatus, Retry
 from rq.registry import StartedJobRegistry, FailedJobRegistry, FinishedJobRegistry
 from rq.suspension import resume, suspend
 from rq.utils import utcnow